44 lines
1.4 KiB
Diff
44 lines
1.4 KiB
Diff
From 88f8a046f27cb81ccc30d038465e963b8300cf1b Mon Sep 17 00:00:00 2001
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From: Valery Ushakov <uwe@stderr.spb.ru>
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Date: Wed, 24 Jan 2024 22:24:41 +0300
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Subject: [PATCH] awk.c: fix CVE-2023-42366 (bug #15874)
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Make sure we don't read past the end of the string in next_token()
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when backslash is the last character in an (invalid) regexp.
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a fix and issue reported in bugzilla
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https://bugs.busybox.net/show_bug.cgi?id=15874
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Upstream-Status: Submitted [http://lists.busybox.net/pipermail/busybox/2024-May/090766.html]
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CVE: CVE-2023-42366
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Signed-off-by: Khem Raj <raj.khem@gmail.com>
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[Thomas: https://git.openembedded.org/openembedded-core/tree/meta/recipes-core/busybox/busybox/0001-awk.c-fix-CVE-2023-42366-bug-15874.patch?id=e0ff4813b1cf4df0d851c857d57fb88d7db51bdd]
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Upstream: http://lists.busybox.net/pipermail/busybox/2024-May/090766.html
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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---
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editors/awk.c | 6 ++++--
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1 file changed, 4 insertions(+), 2 deletions(-)
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diff --git a/editors/awk.c b/editors/awk.c
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index 64e752f4b..222e6298d 100644
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--- a/editors/awk.c
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+++ b/editors/awk.c
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@@ -1234,9 +1234,11 @@ static uint32_t next_token(uint32_t expected)
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s[-1] = bb_process_escape_sequence((const char **)&pp);
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if (*p == '\\')
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*s++ = '\\';
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- if (pp == p)
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+ if (pp == p) {
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+ if (*p == '\0')
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+ syntax_error(EMSG_UNEXP_EOS);
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*s++ = *p++;
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- else
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+ } else
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p = pp;
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}
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}
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--
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2.48.1
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